Cleanup network examples:
- use nullptr
- use member-init
- adjust includes
- use new-style connects
Change-Id: I80aa230168e5aec88a1bc93bbf49a471bfc30e7b
Reviewed-by: Timur Pocheptsov <timur.pocheptsov@qt.io>
- Introduce a common header file for client and server;
- Update license headers;
- Fix minor issues.
Change-Id: I3fc42fd5ba32141c702fc6679a27bf0b6a16fd26
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>